Heat-insulating construction material



Jan. 25, 1927. "1,615,801

A. ELMENDORF HEAT-INSULATINGCONSTRUCTION MATERIAL Filed Feb 4. 1921 Patented Jan. 25, 1927.

UNITED STATES PATENT OFFICE.

ARMIN ELMENIDORF, OF CHICAGO, ILLINOIS, ASSIGNOR TO HASKELITE MANUFAC- TURING CORPORATION, A CORPORATION OF NEW YORK.

HEAT-INSULATING CONSTRUCTION MATERIAL.

Application filed February 4, 1921.

My invention has for its object to produce a simple, strong and durable material particularly adapted for use in walls for refrigerators, refrigerator cars, or elsewhere where heat insulating properties are desirable.

A further object of the present invention is to produce a simple and novel heatinsulating material, a single thickness of which may be substituted for built-up walls of many layers for the purpose of securing heat insulating characteristics.

The various features of novelty whereby my invention is characterized will hereinafter he pointed out with particularity in the claims; but, for a full understanding of my invention and of its objectsand advantages, reference may be. had to the following detailed description taken in connection with the accompanying drawing, wherein:

Figure 1 isa perspective view of a sheet of my improved material;

Fig. 2 is a cross section, on an enlarged scale, through a fragment of such material; and

Fig. 3 is a perspective view of afragmentof a modified form of the material.

In accordance with my invention I take a thick sheet. 1. of a good heat insulating material, preferably cork board which is not only a good heat insulator but is likewise resilient and elastic, and sheath or cover this sheet on both of its broad faces with suitable wearing material. Inthe arrangement shown in Figs. 1 and 2, the sheathing on both faces consists of multipleply wood veneer, as indicated at 2 and 3,

the layers of which are preferably secured together with a waterproof blood glue and each of the sheathing layers beingglued to the core layer of heat insulating material. All of the glued ioints could be made in a press at the same time, but a much heavier pressure is re uired to glue' together the layers of woo than is needed to glue the Serial No. 442,406.

wood to the yieldable cork board, and therefore I prefer to make the ply-wood in the usual way and then glue it to the core.

The surface layers of the finished product may be made out of wood of any desired kind, so as to permit the material to fit in with any desired scheme of woodwork and present any desired surface characteristics obtainable with the use of wood. In some cases, refrigerators for example, it may be desirable to have at. least one of the faces of the sheet finished in metal. A construction of this kind is shown in Fig. 3 in which the core mem- .ber, 1, is covered on one side with a sheet of ply-wood, 2, while on the other face is a sheet of metal, 4. The metal may be glued directly'to the core. I have found it to he apparently advantageous, however, to interpose between the metal and the core a layer of fabric, 5, the fabric being glued both to the core and-to the metal and, particularly where the fabric is Canton flannel or similar material, serving to make an extremely effective union between the insulating core and the metal.

While I have illustrated and described a few preferred forms of my invention, I do not desire to be limited to the exact structural details thus illustrated and described; but'intend to cover all forms and arrangements which come within the terms employed in the definitions of my invention constituting the appended claim.

I claim:

A material comprising a thick stiff selfsupporting sheet ofcork board and comparatively thin layers of sheathing material glued to and extending over only the broad faces thereof, at least one of said layers being metal.

In testimony whereof, I sign this specification.

ARMIN ELMENDORF. 

